I have activated zero subtotal payment in the configuration. And i have made sure, that it is activated for the shop (I explicitly activated it for the shop, even if it is set active globally).
But it does not show in the backend Manage->Products->(Some Product)->Prices->Disabled Payment Methods
And it is not available during checkout. I edited the
getMethods() method from
Mage_Payment_Block_Form_Container to log the available payment methods. And the only methods returned are: debit, bankpayment and invoice.
Furthermore i did a diff of the core/Mage/Payment folder with the source of Magento 18.104.22.168 and have found no differences.
Has anyone an idea, what I'm doing wrong?